system.cpp

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include <common/system.h>
 
#include <logging.h>
#include <util/string.h>
#include <util/time.h>
#include <util/translation.h>
 
#include <cstdlib>
#include <locale>
#include <stdexcept>
#include <string>
#include <thread>
 
#ifndef WIN32
#include <sys/stat.h>
#else
#ifdef _MSC_VER
#pragma warning(disable : 4786)
#pragma warning(disable : 4804)
#pragma warning(disable : 4805)
#pragma warning(disable : 4717)
#endif
 
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <codecvt>
#endif
 
#ifdef HAVE_MALLOPT_ARENA_MAX
#include <malloc.h>
#endif
 
// Application startup time (used for uptime calculation)
const int64_t nStartupTime = GetTime();
 
#ifndef WIN32
std::string ShellEscape(const std::string &arg) {
    std::string escaped = arg;
    ReplaceAll(escaped, "'", "'\"'\"'");
    return "'" + escaped + "'";
}
#endif
 
#if defined(HAVE_SYSTEM)
void runCommand(const std::string &strCommand) {
    if (strCommand.empty()) {
        return;
    }
#ifndef WIN32
    int nErr = ::system(strCommand.c_str());
#else
    int nErr = ::_wsystem(
        std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t>()
            .from_bytes(strCommand)
            .c_str());
#endif
    if (nErr) {
        LogPrintf("runCommand error: system(%s) returned %d\n", strCommand,
                  nErr);
    }
}
#endif
 
void SetupEnvironment() {
#ifdef HAVE_MALLOPT_ARENA_MAX
    // glibc-specific: On 32-bit systems set the number of arenas to 1. By
    // default, since glibc 2.10, the C library will create up to two heap
    // arenas per core. This is known to cause excessive virtual address space
    // usage in our usage. Work around it by setting the maximum number of
    // arenas to 1.
    if (sizeof(void *) == 4) {
        mallopt(M_ARENA_MAX, 1);
    }
#endif
// On most POSIX systems (e.g. Linux, but not BSD) the environment's locale may
// be invalid, in which case the "C.UTF-8" locale is used as fallback.
#if !defined(WIN32) && !defined(MAC_OSX) && !defined(__FreeBSD__) &&           \
    !defined(__OpenBSD__)
    try {
        // Raises a runtime error if current locale is invalid.
        std::locale("");
    } catch (const std::runtime_error &) {
        setenv("LC_ALL", "C.UTF-8", 1);
    }
#elif defined(WIN32)
    // Set the default input/output charset is utf-8
    SetConsoleCP(CP_UTF8);
    SetConsoleOutputCP(CP_UTF8);
#endif
}
 
bool SetupNetworking() {
#ifdef WIN32
    // Initialize Windows Sockets.
    WSADATA wsadata;
    int ret = WSAStartup(MAKEWORD(2, 2), &wsadata);
    if (ret != NO_ERROR || LOBYTE(wsadata.wVersion) != 2 ||
        HIBYTE(wsadata.wVersion) != 2) {
        return false;
    }
#endif
    return true;
}
 
int GetNumCores() {
    return std::thread::hardware_concurrency();
}
 
// Obtain the application startup time (used for uptime calculation)
int64_t GetStartupTime() {
    return nStartupTime;
}